SCIENCEI

AUGUST 25, 1950

ADAPTING TO CALORIC RESTRICTIONHENRY L. TAYLOR AND ANCEL KEYS

AAAS AND AIBS MEETINGSC. J. HYLANDER, H. A. MEYERHOFF,

AND R. L. TAYLOR

TECHNICAL PAPERS

COMMENTS AND COMMUNICATIONSBOOK REVIEWS

ASSOCIATION AFFAIRS

NEWS AND NOTES

COMPLETE TABLE OF CONTENTS ON PAGE 3VOLUME 112, NUMBER 2904

AMERICAN ASSOCIATION FOR THE

ADVANCEMENT OF SCIENCE__~~~~

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2 SCENE Vol112:X:S.,u'SCIENCE,, Vol. 1 122

SCIENCEVol. 112 No. 2904 Friday, August 25, 1950

Table of ContentsAdaptation to Caloric Restriction:Henry Longstreet Taylor and Ancel Keys ..... 215

Meetings of the A.A.A.S. and A.I.B.S.:A Joint Statement: Clarence J. Hylander,Howard A. Meyerhoff, and Raymond L. Taylor 219

Technical PapersNueleodepolymerase Activity ofPrecancerous Rat Liver: Antonio Cantero,Roger Daoust, and Gaston de Lamirande ... 221

Determination of DDT by Bioassay:C. Pagan and R. H. Hageman ............ .................. 222

Tyrosinase in Human Skin: Demonstrationof Its Presence and of Its Role in HumanMelanin Formation:

Thomas B.Fitzpatrick et al 223

Zinc Precipitation of Plasmin:John H. Kay ..... ... ...... 225

A Simple Technique for ObservingCarotid and Brachial Artery Pulse:James W. Benjamin and Louis A. Susca ...... 226

Cretaceous Rocks in the Kamishak Bay Area,Cook Inlet, Alaska: John C. Hazzard et al. 226

Lower Cretaceous Rocks at Cape KaguyakNorth of Kukak Bay, Alaska:

John C. Hazzard .................. 227

Measurement of Ion Migration on Paper in anElectric Field. Transference Numbers ofNickel and Copper Sulfates:Hugh J. McDonald, Matthew C. Urbin,

and MartinB.Williamson 227

Penetration of Benzpyrene into theStomach Wall of Mouse: Kai Setild and

PerEkwall ...................... 229

Oxygen Consumption and RadiophosphateUptake by Minced Brain from Mice ofDifference Ages in Relation to Propagationof Mouse Encephalomyelitis Virus:Max E. Rafelson, Jr., Harold E. Pearson,

andRichard J. Winzler .................................... 231

Comments and CommunicationsThe Study of Disordered Systems:Discussions by John C. Neess, C. H. Goulden,and N. T. Gridgeman ................. .. 233

Book ReviewsMedical Physics, Vol. II: Otto Glasser, Ed..Reviewed by Henry Eyring .235

Microbiologie du Sol: S. Winogradsky.Reviewed by R. E. Hungate 235

Scientific Book Register.. 236

Association AffairsSalt Lake City Meeting of the PacificDivision: Robert C. Miller ... 236

Hotel Reservations and Advance RegistrationfortheCleveland Meeting ..................... ............. 238

News and Notes . ... 239

Science, founded in 1880, is published each Friday by theAmerican Association for the Advancement of Science at theBusiness Press, 10 McGovern Ave., Lancaster, Pa. Enteredas second-class matter at the Post Office at Lancaster, Pa.,January 13, 1948, under the Act of March 3, 1879. Accept-ance for mailing at the special rate postage provided for inthe Act of February 28. 1925, embodied in Paragraph (d-2)Section 34.40 P. L. & R. of 1948.

All correspondence should be sent to Science, 1515 Massa-chusetts Ave., N. W.. Washington 5, D. C. The AAAS as-sumes no responsibility for the safety of manuscripts or for

the opinions expressed by contributors. Four weeks' noticeis required for change of address, and an address stencil labelfrom a recent Issue must be furnished. Claims for a missingnumber will be allowed only if received within 60 days fromdate of issue.

Annual subscriptions, $7.50; single copies, $.25: foreignpostage, outside the Pan-American Union, $1.00; Canadianpostage, $.50.The AAAS also publishes The Scientific Monthly. Subscrip-

tion rates on request.

3

AAAS EDITORIAL BOARD(Terms Eapire June 30, 1951)

H. Bentley Glass Karl Lark-HorovitzLorin J. Mullins Malcolm H. Soule

Howard A. MeyerhoffChairman

Beth WilsonExecutive Editor of Science

F. A. Moulton, Advertising Representative

TEXTS FOR FALL TERMMEDICAL ENTOMOLOGY, Second Edition, by

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ATOMIC PHYSICSBy WOLFGANG, FINKELNBURG, Formerly Professor of Physics, UUniversity of Strassburg.International Series in Pure and Applied Physics. 498 pages, $6.50

This text covers the whole field of nuclear, atomic, molecular, and solid-state physics from theatoinistic point of view, starting at a relatively low level and leading the reader to an under-standing of all important empirical facts and theories and to a realization of the unsolvedproblems and trends of present-day research.

BREEDING AND IMPROVEMENT OF FARM ANIMALS. New 4th editionBy V. A. RICE, University of Massachusetts, and F. N. ANDREWS, Purdue University.AMcGraw-Hill Publications in the Agriculttral Sciences. In press

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This outstanding text has been thoroughly revised to incorporate new developments since pub-lication of the first edition. It is designed to enable the student to identify the fresh-water algaeof this country, and to summarize the morphology and life histories of these algae. New ma-terial is included on 75 to 80 genera reported since 1933, and over 100 new illustrations havebeen added.

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SCONCE, Vol. 112a